i3NetZero is a member of the i3Group, which includes i3Works and i3Secure. i3NetZero is a Climate, ESG and Sustainability management consultancy, focused on driving systematic sustainability and transformational change projects and programmes.

In this rapidly changing world, climate change, environmental impact, social responsibility, and sustainable practices are critical considerations for all governments, ministries, companies and organisations. Collaborating with our clients and partners, our team at i3NetZero drive innovation and delivery, working closely together on sustainability transformation.

We are a forward-thinking innovative group of companies focused on transformation, assurance, cyber security, digital programmes and portfolio management (P3M). We provide advisory, strategic guidance, implementation and ongoing agile collaboration with clients and partners.

i3NetZero is committed to addressing the biggest climate and sustainability issues in the most challenging sectors and driving positive environmental and social impact to increase resilience and reduce carbon emissions to net zero.

Our comprehensive Climate, ESG and Sustainability consultancy is curated to assist public, private, defence, energy, IT and infrastructure sector organisations navigate a changing landscape to embrace a sustainable future.

Through our advisory services and support for large-scale transformational programmes, we deliver experienced agile management, scientific expertise, data-driven insights and innovative technological and strategic solutions. Our approach addresses government requirements to meet climate challenges and social value, international standards, policies and ESG guidelines, and companies’ sustainability and climate objectives.

We are a trusted partner across climate, ESG, and sustainability initiatives, providing reliable enhanced services for government, corporations and international organisations.


Our Vision and Values

i3NetZero is realising our Climate, ESG & Sustainability Vision to be a leading dynamic, strategic, transformation consultancy that our colleagues love working for, and our clients love working with.

i3NetZero and i3Group have grown rapidly, bringing fresh skills, mindsets and perspectives. As a trusted leader in the public and private sectors, respected by all colleagues and clients alike, we unite and celebrate our company-wide values, principles and culture of Unity, Balance, Courage, Curiosity, Dynamism and Agility.

We Invest in Our People

Our expert and innovative directors are highly-regarded management consultants in their own right. They provide strategic guidance for our company, drive us forward, and set the standards to which the rest of the team aspire. All are equally at ease with providing inspirational leadership for multi-billion-pound national programmes as they are having a cuppa and a welcoming chat with our newest employees. They bring an open, approachable, and honest culture to i3NetZero and i3Group which has become one of our greatest strengths.

The Role & Responsibilities

This Senior Consultant role is a key position within our business; we are looking for a dynamic and experienced individual and the right person with proven entrepreneurial and organisational abilities to help build our consulting services and capabilities across our business. We will expect the successful candidate to lead and mentor our staff on the various Climate, ESG and Sustainability assignments, work to support and develop new routes to market and actively engage in business development activities as and when required.

  • To contribute to the development and delivery of the Climate, ESG & Sustainability transformation consultancy for the business
  • To ensure the successful delivery of client-facing assignments
  • Support winning new work and oversee and contribute to the assembly of high-quality tenders and/or submissions
  • Lead and support the development and implementation of strategies programmes and initiatives for clients that align with their climate and sustainability goals
  • Implementation of best-practice methodologies
  • Be an authority on key aspects of Climate, ESG and Sustainability
  • Implementation of requirements for project planning, cost recording, reporting, and analysis
  • Work collaboratively with cross-functional teams integrating climate and sustainability practices into submissions and initiatives
  • Identify, evaluate and drive key innovative and creative opportunities
  • Lead cross-functional teams in identifying innovative solutions and technologies that support sustainability goals including renewable energy, climate risk and resilience, circular economy practices and sustainable value chain management
  • Support marketing the organisation’s capabilities, win work with clients and support growth
  • Maintain and develop the highest standards of client relations including major client account management
  • Maintain and report on sales pipeline focused on the delivery of Climate, ESG & Sustainability
  • Enhance climate and sustainability reporting and disclosure processes, ensuring compliance and driving innovation that contributes to positive climate outcomes
  • Stay informed about emerging climate trends, regulations and best practices ensuring that we remain at the forefront of climate, ESG and sustainability action
  • Engage with internal and external stakeholders to foster strong relationships and communicate the company’s services, expertise and experience
  • Participate in relevant industry forums, conferences and working groups, promoting thought leadership, communicating our achievements and staying informed about trends
  • Oversee the preparation of comprehensive ESG, climate and sustainability reports ensuring accuracy, transparency and alignment with industry standards and frameworks such as CDP, B-Corp, ISSB, UN Global Compact, TCFD, TNFD, SBTi, ISO
  • A key part of this Senior Consultant role will be the delivery and further development of our services including those under the following areas of work:
  • Climate Risk & Resilience / Net Zero & the Energy Transition / Sustainable Technology / ESG Analyses, Audit & Assurance / Circular Economy & Value Chain
  • Sustainability advisory
    • Strategy development / Carbon analysis and management / Transformation management
  • Digital Sustainability advisory
    • Greener software / Carbon reduction / Sustainable architecture / Data privacy and security / Circular economy / AI
  • Sustainability resource provision
    • Project, Programme & Portfolio Management (P3M) and Project Control (PC)

Core Skills

  • Consultancy experience in a Climate, ESG and Sustainability or a closely related field
  • Expertise in sustainability and decarbonisation demonstrated by an understanding of client’s requirements, the market, regulatory frameworks and processes
  • Experience delivering projects, programmes and solutions for clients in carbon accounting, aligned to the GHG Protocol
  • A strong and demonstrable track record in sales and scoping out and delivering consulting solutions
  • Focused on building and nurturing strong client and colleague relationships
  • Experience in defining, managing and delivering complex Projects / Programmes / Portfolios and accordingly managing clients and collaborative partner relationships
  • Recent experience of working with or within the Ministry of Defence, Nuclear, Public Sector, IT or Infrastructure programmes, or equivalent level of experience
  • Understand the classification and protection of classified information
  • Project and programme delivery organisation
  • Experience in developing business change and transformation strategies
  • Knowledge and experience of sustainable digital technologies and data
  • Experience with continuous improvement and benchmarking methodologies
  • Ability to work on own initiative and work extremely well remotely
  • Demonstrable effective communication, negotiation and influencing skills
  • Ability to identify key areas for the business to develop capability
  • Experience in a sales target, account focussed, new business environment
  • Ensure all information received by the client is accurate and detailed in order to exceed client expectations, oversee and be responsible for accuracy of consultancy projects and programmes
  • Ability to lead multi-disciplinary programme teams; managing performance and delivery
  • Strong problem-solving and analytical skills
  • Experience in data analysis and interpretation
  • Excellent interpersonal, communication and presentation skills
  • Extremely proficient in Microsoft Office especially Word, Excel and Powerpoint
  • Proactive, self-motivated, self-starter and entrepreneurial
  • UK Driving Licence
  • The suitable candidate will be expected to achieve Security Clearance
  • High energy levels, passion and enthusiasm with a ‘Can-Do’ attitude
  • Specific experience in at least two of the following areas of Climate, ESG and Sustainability is highly desirable:
  • Climate Risk & Resilience (such as impacts analysis, loss & damage, quantification adaptation, sustainable transformation)
  • ESG Analyses, Audit & Assurance (such as inc. climate finance assessments & implementation, natural resources, ESG frameworks and operations, social value)
  • Net Zero & Energy Transition (such as carbon accounting, decarbonisation, GHG analysis, and mapping, renewable energy, livelihoods, strategy and transformation)
  • Circular Economy & Value Chain (inc. procurement, waste, supply, decommissioning & disposal, P3M)
  • Sustainable Technology (inc. carbon removal, transport, infrastructure, clean energy, digital and data, security)


  • Knowledgeable of project funding routes and bid systems
  • Ability to bid manage complex proposals and provide technical assurance of bid costings and scope, leading bid teams and opportunity pursuit teams
  • Experience in the delivery of programme assurance reviews delivery on projects of increasing size and complexity and in the delivery of major business and change management solutions
  • A network of relevant contacts in climate, ESG and sustainability
  • BA or BSc in a relevant area
  • MSc or MA in a relevant area
  • Work experience in THE Defence Industry / Ecosystem
  • Security Clearance
  • Member IEMA
  • PRINCE2 Practitioner
  • Ability to lead the development of new capabilities and be accountable for the resulting sales


  • Private Healthcare/medical cover
  • Group life insurance
  • Annual bonus scheme (performance dependent)
  • 25 days holiday plus bank holidays (increasing by x1 day per each calendar year, after your 2nd anniversary with the company– rising to a maximum of 30 days + bank holidays)  Annual leave buy/sell purchase scheme (can purchase up to 5 days per year)
  • 5% company pension contribution
  • £250.00 donation towards a Grassroots Organisation or Charity
  • Mental Health and General Wellness benefit (2 sessions per calendar month with a maximum value of £60.00 per session)
  • Electric Car Leasing Salary sacrifice scheme
  • Cycle to Work Scheme (save 25-39% on a bike and accessories)
  • Paid qualifications through the i3Institue for employees at all levels
  • Additional paid sick leave cover for COVID-related sickness absences
  • Staff referral bonus scheme

Schedule: 40 hours per week, Monday to Friday